From ITN (UK). "This young lady was callous, sadistic. She was attacking children after children. They were vulnerable, innocent, defenceless and yet she had no emotion whatsoever and no remorse." Former detective It was a shocking betrayal of trust - a serial killer working in a children's ward, committing acts of murder on the patients in her care. "She was quite calm, quite confident for somebody who's just been arrested for murder." Retired Detective Superintendent British nurse Beverley Allitt was convicted of killing four children in small regional hospital in 1991. Another nine children survived her attempts to kill them.